fdupes from home:uibmz:opsi:4.1:stable project
Select Your Operating System
Add repository and install manually
For RHEL 7 run the following as root:
cd /etc/yum.repos.d/ wget https://download.opensuse.org/repositories/home:uibmz:opsi:4.1:stable/RHEL_7/home:uibmz:opsi:4.1:stable.repo yum install fdupes